On Mon 2018-07-30 16:33:15, David Howells wrote: > Pavel Machek <pavel@xxxxxx> wrote: > > > Well, I guess errors should have numbers, and catalog explaining what > > error means what. That way userspace can translate, and it is what we > > do with errno. > > > > I believe numbers are best. If you hate numbers, you can still use > > strings, as long as you can enumerate them in docs (but it will be > > strange design). > > Simply returning error numbers is *not* sufficient. The messages need to be > parameterised. Still userland needs a way to understand the errors. One way is to pass ( "not enough pixie dust (%d too short) on device %s in %s", 123, "foo", "warddrobe" ). But if you pass it as one string, it becomes hard / impossible to parse. (For example if device is named "foo in bar".) Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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